There is life after coking for Ir nanocatalyst superlattices
EntityUAM. Departamento de Física de la Materia Condensada; UAM. Departamento de Física de Materiales
10.1007/s12274-022-4300-zNano Research 15 (2022): 6969–6976
ISSN1998-0124 (print); 1998-0000 (online)
Funded byOpen access funding provided thanks to the CRUE-CSIC agreement with Springer Nature
ProjectGobierno de España. MAT2016-77852-C2-2-R
SubjectsCatalysis; Coke; Nanoparticles; Scanning tunneling microscopy (STM); X-ray photoemission spectroscopy (XPS); Física
Rights© The Author(s) 2022
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
Achieving superior performance of nanoparticle systems is one of the biggest challenges in catalysis. Two major phenomena, occurring during the reactions, hinder the development of the full potential of nanoparticle catalysts: sintering and contamination with carbon containing species, sometimes called coking. Here, we demonstrate that Ir nanocrystals, arranged into periodic networks on hexagonal boron nitride (h-BN) supports, can be restored without sintering after contamination by persistent carbon. This restoration yields the complete removal of carbon from the nanocrystals, which keep their crystalline structure, allowing operation without degradation. These findings, together with the possibility of fine tuning the nanocrystals size, confer this nanoparticle system a great potential as a testbed to extract key information about catalysis-mediated oxidation reactions. For the case of the CO oxidation by O2, reaction of interest in environmental science and green energy production, the existence of chemical processes not observed before in other nanoparticle systems is demonstrated
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Google Scholar:Martínez Galera, Antonio J. - Guo, Haojie - Jiménez Sánchez, Mariano D. - Franchi, Stefano - Prince, Kevin C. - Gómez Rodríguez, José María
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